Answer
$26 \frac{\text{ miles}}{\text{ gallons}}$
Work Step by Step
156 miles to 6 gallons --> $\frac{156\text{ miles}}{6\text{ gallons}}=\frac{156\text{ miles}\div6}{6\text{ gallons}\div6} = 26 \frac{\text{ miles}}{\text{ gallons}}$
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